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Finding the Third Proportional to 137,128 and 207,153

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Solution

The third proportional to 137,128 and 207,153 is: 312,936.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,128 : 207,153 = 207,153 : x
  2. Step 2: Convert to fraction form
    137,128/207,153 = 207,153/x
  3. Step 3: Cross multiply
    137,128x = 207,153 × 207,153
  4. Step 4: Simplify right side
    137,128x = 42,912,365,409
  5. Step 5: Solve for x
    x = 42,912,365,409/137,128
  6. Step 6: Final answer
    x = 312,936.57

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.